Investigators also found numerous videos and photographs showing defendant Andrew Boguslawski, family members, and associates — including Boguslawski’s 16-year-old niece — blowing up several devices, according to the court papers.

The 44-year-old Boguslawski appeared briefly in court Monday afternoon at a hearing, where he acknowledged he had read the charge against him: possession of destructive devices not registered to him in a national firearms database.

Boguslawski waived a bond hearing Wednesday, meaning the government now has 30 days to seek an indictment. Defense lawyer Mark Babb declined to comment.

Video evidence showed Boguslawski had used explosive devices as weapons and distraction devices near civilians and military personnel, according to the complaint by Timothy Burt, special agent with the Bureau of Alcohol, Tobacco, Firearms and Explosives.

The complaint does not say where the devices were blown up but says his niece lives in Ford City, Pa.

Boguslawski had worked at an Indiana National Guard training center and told troopers he had the items for training purposes.